Graphene/SnO 2 nanocomposite-modified electrode for electrochemical detection of dopamine
Sensing and Bio-Sensing Research(2015)
摘要
A graphene-tin oxide (G-SnO2) nanocomposite was prepared via a facile hydrothermal route using graphene oxide and Sn precursor solution without addition of any surfactant. The hydrothermally synthesized G-SnO2 nanocomposite was characterized using a field emission scanning electron microscope (FESEM), high resolution transmission electron microscope (HRTEM), X-ray diffraction (XRD), and energy dispersive spectroscopy (EDS). A homogeneous deposition of SnO2 nanoparticles with an average particle size of 10nm on the graphene was observed in the FESEM and HRTEM images. The G-SnO2 nanocomposite was used to fabricate a modified electrode for the electrochemical detection of dopamine (DA) in the presence of ascorbic acid (AA). Differential pulse voltammetry (DPV) showed a limit of detection (LoD) of 1μM (S/N=3) in the presence of ascorbic acid (AA).
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关键词
Graphene,Tin oxide,Nanocomposite,Electrochemical sensor,Biosensor,Dopamine
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